While there was a slight increase in IL-15 secretion (5 ± 2 vs. 8 ± 3 pg/mL) and IL-10 (1.4 ± 2.0 vs. 2.3 ± 2.5 pg/mL) upon infection, IL-8 and IL-1β remained unchanged (Fig. 1D). Here, IL15 is linked to infection.